In General not, adopting is a good thing.
But considering her age and that she doesnt seem to be the smartest person in the world etc, its hard to say if she is responsible enough for not one but two kids.
Smart, no. Rich, yes. She can afford to hire staff such as nannies and tutors to care for the children so adoption agencies really won't care too much.
Oh adoption is a great thing. And like others have said, she is obviously well off enough financially to take care of the kids.. I just feel people shouldn't have kids that young. But that's a personal thing. All the power to her for doing it!